Write a C program to calculate weighted arithmetic mean.
int main() {
int subject[5][2], totWeight = 0, totwx = 0, i;
float wmean;
/* get the weight and marks from the user */
printf("Enter the Mark and weight for each subject:\n");
for (i = 0; i < 5; i++) {
printf("Subject %d: ", i + 1);
scanf("%d%d", &subject[i][0], &subject[i][1]);
}
/* weighted arithmetic mean calculation */
for (i = 0; i < 5; i++) {
totwx = totwx + (subject[i][0] * subject[i][1]);
totWeight = totWeight + subject[i][1];
}
wmean = (1.0 * totwx) / totWeight;
/* print the output */
printf("\nWeighted Arithmetic Mean: %.2f\n", wmean);
return 0;
}
Output:
jp@jp-VirtualBox:~/$ ./a.out
Enter the Mark and weight for each subject:
Subject 1: 40 5
Subject 2: 50 2
Subject 3: 60 4
Subject 4: 80 3
Subject 5: 45 1
Weighted Arithmetic Mean: 55.00
Enter the Mark and weight for each subject:
Subject 1: 40 5
Subject 2: 50 2
Subject 3: 60 4
Subject 4: 80 3
Subject 5: 45 1
Weighted Arithmetic Mean: 55.00
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